DE102014201885A1 - Cover for at least one display instrument in a vehicle - Google Patents

Cover for at least one display instrument in a vehicle Download PDF

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Publication number
DE102014201885A1
DE102014201885A1 DE102014201885.4A DE102014201885A DE102014201885A1 DE 102014201885 A1 DE102014201885 A1 DE 102014201885A1 DE 102014201885 A DE102014201885 A DE 102014201885A DE 102014201885 A1 DE102014201885 A1 DE 102014201885A1
Authority
DE
Germany
Prior art keywords
cover
microstructure
cover plate
matrix
window area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE102014201885.4A
Other languages
German (de)
Inventor
Manfred Suess
Martin Mayer
Michael HERTWECK
Eckard Unseld
Philip RUDNIK
Wolfgang Tausch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johnson Controls Automotive Electronics GmbH
Original Assignee
Johnson Controls Automotive Electronics GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johnson Controls Automotive Electronics GmbH filed Critical Johnson Controls Automotive Electronics GmbH
Priority to DE102014201885.4A priority Critical patent/DE102014201885A1/en
Priority to US14/611,881 priority patent/US9827736B2/en
Priority to JP2015018430A priority patent/JP6153550B2/en
Publication of DE102014201885A1 publication Critical patent/DE102014201885A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2673—Moulds with exchangeable mould parts, e.g. cassette moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
    • B29C45/372—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings provided with means for marking or patterning, e.g. numbering articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/14—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
    • B32B5/147—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces by treatment of the layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Arrangement of adaptations of instruments
    • B60K35/215—
    • B60K35/425—
    • B60K35/60—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K37/00—Dashboards
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/408—Matt, dull surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/414—Translucent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/418—Refractive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/006—Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/14—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
    • B32B5/142—Variation across the area of the layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/03—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers with respect to the orientation of features
    • B60K2360/28—
    • B60K2360/693—
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • G01D11/26—Windows; Cover glasses; Sealings therefor
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23—Sheet including cover or casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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    • Y10T428/23—Sheet including cover or casing
    • Y10T428/239—Complete cover or casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24322—Composite web or sheet
    • Y10T428/24331—Composite web or sheet including nonapertured component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10T428/2495—Thickness [relative or absolute]

Abstract

Die Erfindung betrifft eine Abdeckscheibe (1) zur mindestens teilweise transparenten Abdeckung von mindestens einem Anzeigeinstrument (2.1 bis 2.8) in einem Fahrzeug, bei der auf mindestens einer Oberfläche eine Mikrostruktur (1.3) aufgebracht ist, die geeignet ist, auf die Abdeckscheibe (1) einfallendes sichtbares Licht zu streuen, wobei mindestens ein Fensterbereich (1.1, 1.2) der Abdeckscheibe (1) von der Mikrostruktur (1.3) ausgespart ist. Die Erfindung betrifft ferner ein Verfahren zur Herstellung einer solchen Abdeckscheibe (1) mittels eines Urformwerkzeugs (3) mit aufgebrachter Mikrostrukturmatrix (3.4) zur Abformung einer Mikrostruktur (1.3) auf einem einer Oberfläche einer urgeformten Abdeckscheibe (1) zugeordneten Teil des Urformwerkzeugs (3), wobei Fensterbereichen (1.1, 1.2) zugeordnete Teile des Urformwerkzeugs (3) von der Mikrostrukturmatrix (3.4) ausgespart werden.The invention relates to a cover (1) for at least partially transparent cover of at least one display instrument (2.1 to 2.8) in a vehicle, in which a microstructure (1.3) is applied to at least one surface, which is suitable for the cover (1). scattering incident visible light, wherein at least one window portion (1.1, 1.2) of the cover (1) of the microstructure (1.3) is recessed. The invention further relates to a method for producing such a cover plate (1) by means of a master mold (3) with applied microstructure matrix (3.4) for molding a microstructure (1.3) on a part of the master mold (3) assigned to a surface of a molded cover plate (1). , wherein window portions (1.1, 1.2) associated parts of the master mold (3) are recessed by the microstructure matrix (3.4).

Description

Die Erfindung betrifft eine Abdeckscheibe für mindestens ein Anzeigeinstrument in einem Fahrzeug. The invention relates to a cover for at least one display instrument in a vehicle.

Aus dem Stand der Technik sind Anzeigeinstrumente bekannt, die in ein Fahrzeugcockpit integrierbar sind und die die Anzeige mehrerer verschiedener Kontroll- und Fahrzeugparameter erlauben. Beispielsweise können mittels solcher bekannter Anzeigeinstrumente Parameter wie Geschwindigkeit, Drehzahl, momentaner Kraftstoffverbrauch, Tageskilometerstand, aber auch Warnhinweise wie zu geringer Öldruck, zu hohe Kühlmitteltemperatur oder zu geringer Ladestrom der Lichtmaschine angezeigt werden. Ferner ist es möglich, informative Hinweise, beispielsweise Navigationshinweise oder Hinweise zu einem aktuell wiedergegebenen Audioinhalt, anzuzeigen. Ferner sind so genannte Kombiinstrumente bekannt, welche mehrere Anzeigeinstrumente umfassen und somit das Ablesen verschiedener Kontroll- und Fahrzeugparameter an einem Ort erlauben. Indicator instruments are known from the prior art, which can be integrated in a vehicle cockpit and allow the display of several different control and vehicle parameters. For example, parameters such as speed, speed, instantaneous fuel consumption, daily mileage, but also warnings such as too low oil pressure, excessive coolant temperature or too low charging current of the alternator can be displayed by means of such known indicating instruments. Furthermore, it is possible to display informative information, for example navigation instructions or notes on a currently reproduced audio content. Furthermore, so-called combination instruments are known which comprise a plurality of indicating instruments and thus allow the reading of various control and vehicle parameters in one place.

Bekannte Anzeigeinstrumente und/oder Kombiinstrumente sind mittels transparenter Abdeckscheiben abgedeckt, welche die dahinter liegenden Anzeigeinstrumente im Wesentlichen staubdicht abschließen und vor Verschmutzung und mechanischer Beschädigung schützen, zugleich aber eine ungehinderte Ablesung der Anzeigeinstrumente erlauben. Aus dem Stand der Technik sind aus Polymethylmetaacrylat (PMMA) in einem Spritzgussverfahren gefertigte Abdeckscheiben bekannt. Known display instruments and / or instrument clusters are covered by transparent cover plates, which seal the underlying display instruments substantially dust-tight and protect against contamination and mechanical damage, but at the same time allow unhindered reading of the display instruments. From the prior art, made of polymethyl methacrylate (PMMA) manufactured in an injection molding covers are known.

Aus dem Stand der Technik sind ferner Verfahren zur Herstellung einer mikrostrukturierten Oberfläche bekannt, bei denen zunächst in einem Urformschritt Bauteile einer gewünschten Geometrie geformt werden und in einem darauf folgenden Schritt die Oberfläche eines so geformten Bauteils ganz oder teilweise mit einer Mikrostruktur versehen wird. Beispielsweise sind aus dem Stand der Technik Ätzverfahren zum Mattieren von Mineralglasoberflächen bekannt. Furthermore, methods for producing a microstructured surface are known from the state of the art, in which components of a desired geometry are first formed in a primary molding step, and in a subsequent step the surface of a component thus formed is completely or partially provided with a microstructure. For example, etching methods for matting mineral glass surfaces are known from the prior art.

Aufgabe der vorliegenden Erfindung ist es, eine verbesserte Abdeckscheibe für mindestens ein Anzeigeinstrument in einem Fahrzeug und ein Verfahren zur Herstellung einer verbesserten Abdeckscheibe für ein mindestens ein Anzeigeinstrument in einem Fahrzeug anzugeben. The object of the present invention is to specify an improved cover panel for at least one display instrument in a vehicle and a method for producing an improved cover panel for at least one display instrument in a vehicle.

Die Aufgabe wird hinsichtlich der Abdeckscheibe erfindungsgemäß mit einer Abdeckscheibe nach den Merkmalen des Anspruchs 1 gelöst. Hinsichtlich des Herstellungsverfahrens wird die Aufgabe erfindungsgemäß mit einem Verfahren nach den Merkmalen des Anspruchs 5 gelöst. The object is achieved with respect to the cover according to the invention with a cover according to the features of claim 1. With regard to the manufacturing method, the object is achieved according to the invention with a method according to the features of claim 5.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. Advantageous embodiments of the invention are the subject of the dependent claims.

Erfindungsgemäß weist eine Abdeckscheibe zur mindestens teilweise transparenten Abdeckung von mindestens einem Anzeigeinstrument in einem Fahrzeug auf mindestens einer Oberfläche eine Mikrostruktur auf, wobei diese Mikrostruktur so ausgebildet ist, dass auf die Abdeckscheibe einfallendes sichtbares Licht gestreut wird. Hierbei ist mindestens ein Fensterbereich der Abdeckscheibe von der Mikrostruktur ausgespart. According to the invention, a cover plate for at least partially transparent covering of at least one display instrument in a vehicle has a microstructure on at least one surface, wherein this microstructure is designed so that visible light incident on the cover plate is scattered. In this case, at least one window region of the cover plate is recessed by the microstructure.

Die auf die Abdeckscheibe aufgebrachte Mikrostruktur vermindert unerwünschte Reflexe, die bei einer aus dem Stand der Technik bekannten glatten Scheibenoberfläche zur Irritation oder sogar Blendung eines Beobachters, beispielsweise des Fahrers, führen können, mindestens aber die Ablesbarkeit der hinter der Abdeckscheibe angeordneten Anzeigeinstrumente erschweren. Solche unerwünschten Reflexe können beispielsweise durch direkte Sonneneinstrahlung auf die Abdeckscheibe, durch Scheinwerfer anderer, hinter dem Fahrzeug befindlicher Fahrzeuge, aber auch durch Einstrahlung künstlicher Lichtquellen der Fahrzeuginnenbeleuchtung hervorgerufen werden. Mittels einer solchen Mikrostruktur ist es zudem auch möglich, störende Mehrfachabbildungen, so genannte Geisterbilder, von in Sichtrichtung hinter der Abdeckscheibe befindlichen Anzeigeinstrumenten auch bei einer geringen Neigung der Abdeckscheibe zur Sichtrichtung zu reduzieren oder zu vermeiden. The microstructure applied to the cover disc reduces unwanted reflections which, in the case of a smooth disc surface known from the prior art, can lead to irritation or even glare of an observer, for example of the driver, but at least impede the readability of the indicating instruments arranged behind the cover disc. Such unwanted reflections can be caused for example by direct sunlight on the cover, by headlights of other vehicles located behind the vehicle, but also by irradiation of artificial light sources of the vehicle interior lighting. By means of such a microstructure, it is also possible to reduce or avoid disturbing multiple images, so-called ghost images, of display instruments situated behind the cover panel in the viewing direction, even with a slight inclination of the cover panel to the viewing direction.

Da nicht nur der reflektierte, sondern zwangsweise auch der transmittierte Lichtanteil an der Oberfläche einer solchen Abdeckscheibe durch Aufbringung einer Mikrostruktur verringert wird, werden Anzeigeinstrumente hinter einer ganzflächig mit einer Mikrostruktur versehenen Abdeckscheibe mit verminderter Helligkeit, vermindertem Kontrast und verminderter Konturschärfe wahrgenommen. In vorteilhafter Weise vermeidet eine erfindungsgemäße Abdeckscheibe diesen Nachteil, indem die Bereiche, die für die Ablesbarkeit der Anzeigeinstrumente hinter der Abdeckscheibe wesentlich sind, von der Mikrostrukturierung ausgenommen werden. Da diese Bereiche nur einen Teil, typischerweise etwa ein Drittel bis etwa die Hälfte, der gesamten Oberfläche der Abdeckscheibe ausmachen, bleibt die gewünschte Wirkung der Reflexunterdrückung dennoch im Wesentlichen erhalten. Since not only the reflected, but also necessarily the transmitted light fraction at the surface of such a cover is reduced by applying a microstructure, display instruments are perceived behind a full-coverage with a microstructure cover with reduced brightness, reduced contrast and reduced contour sharpness. Advantageously, a cover according to the invention avoids this disadvantage by excluding from the microstructuring the areas which are essential for the readability of the indicating instruments behind the cover. However, because these areas make up only a part, typically about one-third to about one-half, of the entire surface of the cover, the desired effect of reflection suppression is still substantially maintained.

In einer Ausführungsform der Erfindung besteht die Abdeckscheibe im Wesentlichen aus PMMA. PMMA bietet die Vorteile eines leichten, thermoplastisch verformbaren und kostengünstigen Kunststoffs bei glasähnlichen optischen Eigenschaften und relativ hoher Kratzfestigkeit sowie Bruchfestigkeit. Es ist möglich, dem PMMA Substanzen, beispielsweise Mineralsalze beispielsweise zur Färbung, beizumischen. In one embodiment of the invention, the cover consists essentially of PMMA. PMMA offers the advantages of a lightweight, thermoplastically deformable and cost-effective plastic with glass-like optical properties and relatively high scratch resistance and breaking strength. It is possible for PMMA substances, For example, mineral salts, for example, for coloring to mix.

In einer weiteren Ausführungsform der erfindungsgemäßen Abdeckscheibe ist der mindestens eine Fensterbereich so geformt und angeordnet, dass mindestens ein in Sichtrichtung hinter der Abdeckscheibe angeordnetes Anzeigeinstrument durch diesen Fensterbereich ablesbar ist. In vorteilhafter Weise lässt sich eine so ausgebildete Abdeckscheibe zur Abdeckung von mehreren in einem so genannten Kombiinstrument zusammengefassten Anzeigeinstrumenten einsetzen. Typischerweise weisen solche Kombiinstrumente größere Oberflächenbereiche auf, in denen sich keine Anzeigeinstrumente befinden. Indem die zu solchen Oberflächenbereichen korrespondierenden Bereiche der Abdeckscheibe mindestens teilweise mit einer Mikrostrukturierung versehen werden, können störende Reflexionen und/oder Geisterbilder verringert werden, ohne die Ablesbarkeit der Anzeigeinstrumente zu beeinträchtigen. Hierbei ist es möglich, dass ein Fensterbereich ohne Mikrostrukturierung so angeordnet wird, dass sich in Sichtrichtung hinter diesem Fensterbereich ein Anzeigeinstrument vollständig ablesbar befindet. Es ist aber auch möglich, einen Fensterbereich so anzuordnen, dass mehrere dahinter angeordnete Anzeigeinstrumente eines Kombiinstruments abgelesen werden können. In a further embodiment of the cover pane according to the invention, the at least one window area is shaped and arranged such that at least one display instrument arranged in the viewing direction behind the cover pane can be read through this window area. Advantageously, a cover plate designed in this way can be used to cover a plurality of display instruments combined in a so-called combination instrument. Typically, such combination instruments have larger surface areas in which there are no gauges. By at least partially providing the areas of the cover disc corresponding to such surface regions with a microstructuring, disruptive reflections and / or ghost images can be reduced without impairing the readability of the indicating instruments. In this case, it is possible for a window area without microstructuring to be arranged so that a display instrument is completely readable in the viewing direction behind this window area. But it is also possible to arrange a window area so that several arranged behind the display instruments of a combination instrument can be read.

In einer weiteren Ausführungsform der erfindungsgemäßen Abdeckscheibe ist mindestens ein Fensterbereich im Wesentlichen passgenau zu einem durch diesen Fensterbereich ablesbaren Anzeigeinstrument geformt und angeordnet. In vorteilhafter Weise kann eine so ausgebildete Abdeckscheibe zur Gestaltung eines als hochwertig wahrgenommenen äußeren Designs bei einem Kombiinstrument eingesetzt werden. Beispielsweise können Montagespalte und/oder Passungstoleranzen beim Einsetzen einzelner Anzeigeinstrumente in ein Kombiinstrument verdeckt oder weniger leicht sichtbar gestaltet werden. In a further embodiment of the cover pane according to the invention, at least one window area is shaped and arranged substantially accurately to a display instrument which can be read by this window area. Advantageously, such a trained cover for the design of a perceived as high-quality outer design in a combination instrument can be used. For example, mounting gaps and / or fitting tolerances can be obscured or less easily visualized when inserting individual indicating instruments into an instrument cluster.

Ein erfindungsgemäßes Verfahren zur Herstellung einer Abdeckscheibe umfasst die Schritte

  • – Herstellung oder Anpassung mindestens eines Urformwerkzeugs zur Urformung einer Abdeckscheibe, wobei eine Mikrostrukturmatrix zur Abformung einer Mikrostruktur auf einem einer Oberfläche einer urgeformten Abdeckscheibe zugeordneten Teil des Urformwerkzeugs aufgebracht wird, wobei Fensterbereichen zugeordnete Teile des Urformwerkzeugs von der Mikrostrukturmatrix ausgespart werden und
  • – Urformung von mindestens einer Abdeckscheibe mittels des Urformwerkzeugs mit aufgebrachter Mikrostrukturmatrix.
An inventive method for producing a cover comprises the steps
  • Producing or adapting at least one master mold for the primary shaping of a cover pane, wherein a microstructure matrix for molding a microstructure is applied to a part of the master mold associated with a surface of a molded cover pane, parts of the master mold associated with window areas being recessed by the microstructure matrix and
  • - Urformung of at least one cover plate by means of the primary mold with applied microstructure matrix.

Durch die Aufbringung der Mikrostrukturmatrix auf einem Teil des Urformwerkzeugs ist es möglich, eine zu fertigende Abdeckscheibe bereits während des Urformvorgangs an den gewünschten Bereichen mit einer mikrostrukturierten Oberfläche zu versehen, die die erwünschte Minderung von Reflexen an dieser Oberfläche bewirkt. Somit werden nach dem Stand der Technik erforderliche zusätzliche Fertigungsschritte zum Aufbringen einer solchen Mikrostruktur auf eine bereits geformte Abdeckscheibe vermieden. Somit ist durch das erfindungsgemäße Verfahren eine kostengünstigere, einfachere und schnellere Herstellung von Abdeckscheiben mit mindestens teilweise reflexgeminderter Oberfläche möglich. By applying the microstructure matrix to a part of the master mold, it is possible to provide a cover to be manufactured already at the desired areas during the original molding process with a microstructured surface, which causes the desired reduction of reflections on this surface. Thus, additional manufacturing steps required for applying such a microstructure to an already formed cover pane are avoided according to the prior art. Thus, by the inventive method a cheaper, easier and faster production of cover plates with at least partially reflected surface is possible.

Bei einer Ausführungsform des erfindungsgemäßen Verfahrens zur Herstellung einer Abdeckscheibe erfolgt die Urformung der Abdeckscheibe mittels Spritzgießen. Spritzgießen eignet sich als Fertigungsverfahren für die kostengünstige Fertigung von Bauteilen aus Thermoplasten oder Duroplasten, unter anderem für Kunststoffe mit den gewünschten glasähnlichen optischen Eigenschaften. Spritzgießen eignet sich ferner für die Herstellung großer Stückzahlen und ergänzt somit den Vorteil aus der Einsparung weiterer Bearbeitungsschritte zum Aufbringen einer Mikrostruktur auf eine bereits geformte Abdeckscheibe. Es sind jedoch auch andere Urformverfahren wie Formpressen oder Spritzpressen zum Urformen einer Abdeckscheibe bei gleichzeitigem mindestens teilweisen Aufbringen einer Mikrostruktur möglich. In one embodiment of the method according to the invention for producing a cover plate, the primary shaping of the cover plate takes place by means of injection molding. Injection molding is suitable as a manufacturing method for the cost-effective production of components made of thermoplastics or thermosets, including plastics with the desired glass-like optical properties. Injection molding is also suitable for the production of large quantities and thus complements the advantage of saving further processing steps for applying a microstructure on an already shaped cover. However, other primary shaping methods such as compression molding or transfer molding for prototyping a cover plate while at the same time applying a microstructure at least partially are also possible.

Bei einer Ausführungsform des erfindungsgemäßen Verfahrens zur Herstellung einer Abdeckscheibe wird das Urformwerkzeug aus Stahl gefertigt und die Mikrostrukturmatrix mittels Ätzen aufgebracht. Stahl lässt sich mit bekannten Fertigungsverfahren genau und kostengünstig zur Herstellung von Urformwerkzeugen verarbeiten und weist eine hohe Temperaturbeständigkeit und mechanische Festigkeit auf. Somit eignet sich Stahl beispielsweise sehr gut für die Fertigung von Urformwerkzeugen zum Spritzgießen von Thermoplasten. Ferner lässt sich durch Ätzverfahren auf Stahloberflächen sehr leicht und kostengünstig eine Mikrostrukturmatrix ausbilden. Die Komplementär- oder Negativform einer solchen Mikrostrukturmatrix wird als Mikrostruktur auf der Oberfläche eines mit einem so geätzten Urformwerkzeugs aus Stahl abgeformten Bauteils abgebildet. Somit können sehr leicht Spritzgussteile, beispielsweise aus PMMA, mit mindestens teilweise mikrostrukturierter Oberfläche hergestellt werden. In one embodiment of the method according to the invention for producing a cover plate, the primary forming tool is made of steel and the microstructure matrix is applied by means of etching. Steel can be accurately and inexpensively processed with known manufacturing processes for the production of primary molds and has a high temperature resistance and mechanical strength. Thus, for example, steel is very well suited for the production of primary molds for the injection molding of thermoplastics. Furthermore, a microstructure matrix can be formed very easily and cost-effectively by etching processes on steel surfaces. The complementary or negative form of such a microstructure matrix is imaged as a microstructure on the surface of a component molded in such a way with a steel etched original tool. Thus, very easily injection-molded parts, for example of PMMA, can be produced with at least partially microstructured surface.

Ferner ist es möglich, den Ätzvorgang auf bestimmte Bereiche eines Urformwerkzeugs aus Stahl zu beschränken oder bestimmte Bereiche einer Stahloberfläche an einem solchen Urformwerkzeug von der Ätzung auszusparen. Beispielsweise kann ein Ätzgrund oder Abdecklack teilflächig aufgebracht werden, der von der Ätzsubstanz nicht angegriffen wird. Mit diesem Ätzgrund bedeckte Teilflächen einer Oberfläche an einem solchen Urformwerkzeug werden somit nicht geätzt und bleiben in der ursprünglichen Oberflächenqualität, also ohne aufgebrachte Mikrostrukturmatrix, erhalten. Nach der Ätzung wird der Ätzgrund, beispielsweise chemisch mit einem Lösungsmittel oder mechanisch durch Abtragen oder Abreiben, entfernt. Furthermore, it is possible to restrict the etching process to certain areas of a steel forming tool or to exclude certain areas of a steel surface on such a forming tool from the etching. By way of example, an etching base or covering lacquer can be applied over part of the surface which is not attacked by the etching substance. Subareas of a surface covered by this etching base on such a master mold are thus not etched and remain in the original surface quality, that is without an applied microstructure matrix. After the etching, the etching base is removed, for example chemically with a solvent or mechanically by erosion or abrasion.

Dem Fachmann sind ferner lichtempfindliche Ätzgrundmaterialien bekannt. Hierbei wird zunächst ein ganzflächiger Belag aus Ätzgrund auf eine Abformfläche eines Urformwerkzeugs aufgetragen. Durch strukturierte Belichtung, beispielsweise in der Art eines Projektors oder durch eine aufgelegte bereichsweise lichtundurchlässige Belichtungsmaske, wird der Ätzgrundbelag selektiv in einer gewünschten Geometrie einer Belichtung ausgesetzt. In den belichteten Bereichen ändert sich die chemische Zusammensetzung des Ätzgrundbelags. Dadurch kann der Ätzgrundbelag beispielsweise mittels chemischer Verfahren selektiv so abgetragen werden, dass nur Ätzgrund auf den Bereichen der Abformfläche verbleibt, welche entweder alle einer Belichtung ausgesetzt waren oder welche alle von der Belichtung ausgespart waren. Mittels solcher photochemischer Verfahren lassen sich auch komplexe Geometrien sehr genau und gut reproduzierbar auf der Abformfläche eines Urformwerkzeugs auswählen, die eine mikrostrukturierte Oberfläche auf einer damit geformten Abdeckscheibe erzeugt. Photosensitive etching base materials are also known to the person skilled in the art. Here, a full-surface coating of etching primer is first applied to a molding surface of a primary mold. By structured exposure, for example in the manner of a projector or by an applied partially opaque exposure mask, the Ätzunterbelag is exposed selectively in a desired geometry of exposure. In the exposed areas, the chemical composition of the Ätzgrundbelags changes. As a result, the etching base coating can be selectively removed, for example by means of chemical processes, so that only etching ground remains on the areas of the molding surface which have either all been subjected to an exposure or which were all recessed from the exposure. By means of such photochemical methods even complex geometries can be selected very accurately and in a well reproducible manner on the impression surface of a master mold which produces a microstructured surface on a cover plate formed therewith.

Bei einer Ausführungsform des erfindungsgemäßen Verfahrens zur Herstellung einer Abdeckscheibe ist ein die Mikrostrukturmatrix mindestens teilweise tragender Mikrostrukturträger im Urformwerkzeug austauschbar angeordnet. Durch Austausch des Mikrostrukturträgers sind somit Abdeckscheiben mit unterschiedlicher Anordnung von Fensterbereichen bei gleicher geometrischer Grundform herstellbar. In one embodiment of the method according to the invention for producing a cover pane, a microstructure support which at least partially carries the microstructure matrix is arranged interchangeably in the primary mold. By replacing the microstructure support thus cover plates with different arrangement of window areas with the same geometric basic shape can be produced.

Beispielsweise ist es möglich, auf einer im Wesentlichen planen Oberfläche einer Spritzgussmatrize, korrespondierend zu einer Oberfläche einer damit geformten Abdeckscheibe, lösbar einen austauschbaren Mikrostrukturträger in der Art eines Stahlblechs anzuordnen. Ein solcher austauschbarer Mikrostrukturträger kann, beispielsweise mittels eines photochemischen Ätzverfahrens, selektiv geätzt werden. Somit kann ein solcher austauschbarer Mikrostrukturträger eine mikrostrukturierte Oberfläche mit Fensterbereichen auf einer Abdeckscheibe abformen, wobei die Form und Anordnung der Fensterbereiche durch den Auftrag und/oder die Belichtung eines Ätzgrundes auf dem austauschbaren Mikrostrukturträger bestimmt werden. Geätzte Oberflächenbereiche des Mikrostrukturträgers wirken also als Mikrostrukturmatrix und formen mikrostrukturierte Oberflächebereiche auf einer Abdeckscheibe ab, nicht geätzte Oberflächenbereiche des Mikrostrukturträgers formen hingegen Fensterbereiche ohne Mikrostruktur auf einer Abdeckscheibe ab. For example, it is possible, on a substantially planar surface of an injection molding die corresponding to a surface of a cover plate formed therewith, to detachably arrange an exchangeable microstructure support in the manner of a steel sheet. Such an exchangeable microstructure support can be selectively etched, for example by means of a photochemical etching process. Thus, such a replaceable microstructure support can mold a microstructured surface with window areas on a cover pane, wherein the shape and arrangement of the window areas are determined by the application and / or the exposure of an etching base on the exchangeable microstructure support. Etched surface areas of the microstructure support thus act as a microstructure matrix and form microstructured surface areas on a cover pane, while non-etched surface areas of the microstructure support form window areas without a microstructure on a cover pane.

Durch Austausch eines austauschbaren Mikrostrukturträgers gegen einen anderen austauschbaren Mikrostrukturträger, bei dem beispielsweise durch anderen Auftrag und/oder durch andere Belichtung eines Ätzgrunds andere Oberflächenbereiche geätzt wurden, können somit beispielsweise Abdeckscheiben der gleichen geometrischen Bauform, aber mit anderer Anordnung von Fensterbereichen auf einer mikrostrukturierten Oberfläche mit dem gleichen Urformwerkzeug geformt werden. By exchanging an exchangeable microstructure support for another replaceable microstructure support, in which other surface areas were etched, for example by other application and / or by other exposure of an etch base, cover disks of the same geometrical design but with different arrangement of window areas on a microstructured surface can thus be used, for example be formed the same original mold.

Beispielsweise ist es möglich, mit einem Urformwerkzeug Abdeckscheiben für Kombiinstrumente herzustellen, welche zwar geometrisch gleich geformt sind, aber unterschiedliche Anzeigeinstrumente umfassen. Beispielsweise können bei einer Bauform eines Kombiinstruments, die einen Geschwindigkeitsmesser und einen Drehzahlmesser umfasst, zwei Fensterbereiche korrespondierend zum Geschwindigkeitsmesser und zum Drehzahlmesser angeordnet werden. Bei einer anderen Bauform eines solchen Kombiinstruments, die einen Geschwindigkeitsmesser, jedoch keinen Drehzahlmesser umfasst, wird ein Fensterbereich korrespondierend zum Geschwindigkeitsmesser angeordnet und der übrige Bereich der Abdeckscheibe mit einer mikrostrukturierten Oberfläche versehen. For example, it is possible to produce cover plates for combination instruments with a prototype tool, which are geometrically the same, but comprise different indicating instruments. For example, in a combination instrument type comprising a speedometer and a tachometer, two window areas corresponding to the speedometer and tachometer may be arranged. In another design of such a combination instrument, which comprises a speedometer, but not a tachometer, a window portion is arranged corresponding to the speedometer and provided the remaining portion of the cover plate with a microstructured surface.

In vorteilhafter Weise werden somit Kosten für Urformwerkzeuge reduziert. Ferner wird der Ablauf bei der Fertigung von Abdeckscheiben vereinfacht. Advantageously, thus costs for Urformwerkzeuge be reduced. Furthermore, the process in the manufacture of cover plates is simplified.

Anhand der beigefügten schematischen Figuren werden Ausführungsbeispiele der Erfindung näher erläutert. Dabei zeigen Reference to the accompanying schematic figures, embodiments of the invention will be explained in more detail. Show

1 schematisch ein Kombiinstrument und eine Abdeckscheibe sowie 1 schematically an instrument cluster and a cover as well

2 schematisch ein Urformwerkzeug für eine Abdeckscheibe. 2 schematically a master tool for a cover.

Die 1 zeigt in einer schematischen Ansicht eine im Wesentlichen aus PMMA geformte Abdeckscheibe 1 mit rechteckiger Grundform. Die Abdeckscheibe 1 ist für eine Montage in Ableserichtung vor einem Kombiinstrument 2 vorgesehen. Das Kombiinstrument 2 umfasst Anzeigeinstrumente 2.1 bis 2.8. Dabei sind die Anzeigeinstrumente 2.1 und 2.2 beispielhaft als tubenförmige analoge Zeigerinstrumente ausgebildet, die einen drehbaren Zeiger mit zentral angeordneter Zeigerachse und eine im Wesentlichen kreisartige Skalenteilung aufweisen. Beispielhaft ist das Anzeigeinstrument 2.1 als ein Geschwindigkeitsanzeigeinstrument und das Anzeigeinstrument 2.2 als ein Drehzahlanzeigeinstrument ausgebildet. Weitere Anzeigeinstrumente 2.3 bis 2.8 sind als Kontroll- oder Warnleuchten ausgebildet, beispielsweise als Blinkkontrollleuchten 2.3 bis 2.5, als Kontrollleuchte 2.6 für eine Lüfterbetätigung oder als Kontrollleuchten 2.7, 2.8 für eine eingeschaltete Scheibenbeheizung. The 1 shows a schematic view of a substantially molded PMMA cover 1 with rectangular basic shape. The cover 1 is for mounting in reading direction in front of a combination instrument 2 intended. The instrument cluster 2 includes indicating instruments 2.1 to 2.8 , Here are the gauges 2.1 and 2.2 exemplified formed as a tube-shaped analog pointer instruments having a rotatable pointer with centrally arranged pointer axis and a substantially circular scale graduation. An example is the indicating instrument 2.1 as a speed indicating instrument and the indicating instrument 2.2 designed as a speed indicator. Further indicating instruments 2.3 to 2.8 are designed as control or warning lights, such as flashing indicator lights 2.3 to 2.5 , as a warning light 2.6 for a fan or indicator lights 2.7 . 2.8 for a switched on disc heating.

Auf der einem Beobachter zugewandten Oberfläche der Abdeckscheibe 1 ist flächig eine reflexmindernde Mikrostruktur 1.3 aufgebracht, von der zwei im Wesentlichen kreisförmige Fensterbereiche 1.1, 1.2 ausgenommen sind. Die Fensterbereiche 1.1, 1.2 sind so angeordnet, dass bei einer Montage der Abdeckscheibe 1 in Ableserichtung vor dem Kombiinstrument 2 das Geschwindigkeitsanzeigeinstrument 2.1 durch den Fensterbereich 1.1 ablesbar ist und das Drehzahlanzeigeinstrument 2.2 durch den Fensterbereich 1.2 ablesbar ist. On the observer facing surface of the cover 1 is areal a reflex-reducing microstructure 1.3 applied, of the two substantially circular window areas 1.1 . 1.2 with exception of. The window areas 1.1 . 1.2 are arranged so that when mounting the cover 1 in reading direction in front of the instrument cluster 2 the speed gauge 2.1 through the window area 1.1 is readable and the speed indicator 2.2 through the window area 1.2 is readable.

Durch die flächig aufgebrachte Mikrostruktur 1.3 werden störende direkte Reflexe an der optischen Grenzfläche zwischen der Luft und PMMA an der dem Beobachter zugewandten Oberfläche der Abdeckscheibe 1 vermindert. Die von der Mikrostruktur 1.3 ausgesparten Fensterbereiche 1.1, 1.2 verbessern den Kontrast und/oder die Helligkeit und/oder die Abbildungsschärfe der hinter diesen Fensterbereichen 1.1, 1.2 angeordneten analogen Zeigerinstrumente 2.1, 2.2. In vorteilhafter Weise wird dadurch eine ergonomische und genaue Ablesbarkeit, beispielsweise von Geschwindigkeitswerten vom Geschwindigkeitsanzeigeinstrument 2.1 oder von Drehzahlwerten vom Drehzahlanzeigeinstrument 2.2 ermöglicht. Für derartige analoge Zeigerinstrumente 2.1, 2.2 ist die quantitativ genaue Ablesung von konkreten Werten besonders bedeutsam. Die übrigen als Kontroll- oder Warnleuchten ausgebildeten Anzeigeinstrumente 2.3 bis 2.8 können hingegen auch hinter mittels aufgebrachter Mikrostruktur 1.3 mattierten Bereichen der Abdeckscheibe 1 ausreichend gut erkannt werden. Due to the surface applied microstructure 1.3 become disturbing direct reflections at the optical interface between the air and PMMA at the observer facing surface of the cover 1 reduced. The of the microstructure 1.3 recessed window areas 1.1 . 1.2 enhance the contrast and / or the brightness and / or the sharpness of the image behind these window areas 1.1 . 1.2 arranged analog pointer instruments 2.1 . 2.2 , Advantageously, this provides an ergonomic and accurate readability, for example of speed values from the speed indicator 2.1 or speed values from the speed indicator 2.2 allows. For such analog pointer instruments 2.1 . 2.2 the quantitatively accurate reading of concrete values is particularly significant. The other designed as a control or warning lights indicating instruments 2.3 to 2.8 On the other hand, they can also be located behind by means of an applied microstructure 1.3 frosted areas of the cover 1 be recognized sufficiently well.

Die 2 zeigt in einer schematischen Ansicht ein Urformwerkzeug 3 zur Urformung einer Abdeckscheibe 1 mit rechteckiger Grundform. Das Urformwerkzeug 3 ist in eine obere Matrize 3.1 und in eine untere Matrize 3.2 geteilt. Auf der unteren Matrize 3.2 ist ein Mikrostrukturträger 3.3 angeordnet. Die zu der oberen Matrize 3.1 weisende Oberfläche des Mikrostrukturträgers 3.3 trägt eine Mikrostrukturmatrix 3.4 mit einem im Wesentlichen rechteckigen Umriss und zwei zu den Fensterbereichen 1.1, 1.2 korrespondierende kreisförmige Aussparungen 3.3.1, 3.3.2. The 2 shows a schematic view of a prototype tool 3 for forming a cover plate 1 with rectangular basic shape. The original tool 3 is in an upper die 3.1 and in a lower die 3.2 divided. On the lower die 3.2 is a microstructure support 3.3 arranged. The to the upper die 3.1 facing surface of the microstructure support 3.3 carries a microstructure matrix 3.4 with a substantially rectangular outline and two to the window areas 1.1 . 1.2 corresponding circular recesses 3.3.1 . 3.3.2 ,

Es ist möglich, dass der Mikrostrukturträger 3.3 lösbar mit der unteren Matrize 3.2 verbunden ist und ausgetauscht werden kann. Hierdurch ist es möglich, mit dem gleichen Urformwerkzeug 3 Abdeckscheiben 1 der gleichen rechteckigen Grundform, jedoch unterschiedlicher Anzahl und/oder Form und/oder Anordnung von Fensterbereichen 1.1, 1.2 zu fertigen. In vorteilhafter Weise ist somit eine kostengünstigere und flexiblere Herstellung von Abdeckscheiben 1 möglich. It is possible that the microstructure support 3.3 detachable with the lower die 3.2 is connected and can be exchanged. This makes it possible with the same original tool 3 cover plates 1 the same rectangular basic shape, but different number and / or shape and / or arrangement of window areas 1.1 . 1.2 to manufacture. Advantageously, thus a cheaper and more flexible production of cover plates 1 possible.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1 1
Abdeckscheibe cover plate
1.1, 1.2 1.1, 1.2
Fensterbereich pane
1.3 1.3
Mikrostruktur microstructure
2 2
Kombiinstrument instrument cluster
2.1 bis 2.8 2.1 to 2.8
Anzeigeinstrument Gauge
3 3
Urformwerkzeug original form tool
3.1 3.1
obere Matrize upper die
3.2 3.2
untere Matrize lower die
3.3 3.3
Mikrostrukturträger Microstructure carrier
3.3.1, 3.3.2 3.3.1, 3.3.2
Aussparung recess
3.4 3.4
Mikrostrukturmatrix Microstructure matrix

Claims (8)

Abdeckscheibe (1) zur mindestens teilweise transparenten Abdeckung von mindestens einem Anzeigeinstrument (2.1 bis 2.8) in einem Fahrzeug, dadurch gekennzeichnet, dass auf Teilen von mindestens einer Oberfläche der Abdeckscheibe (1) eine Mikrostruktur (1.3) aufgebracht ist, die so ausgebildet ist ist, dass auf die Abdeckscheibe (1) einfallendes sichtbares Licht gestreut wird, wobei mindestens ein Fensterbereich (1.1, 1.2) der Abdeckscheibe (1) von der Mikrostruktur (1.3) ausgespart ist. Cover plate ( 1 ) for the at least partially transparent cover of at least one display instrument ( 2.1 to 2.8 ) in a vehicle, characterized in that on parts of at least one surface of the cover ( 1 ) a microstructure ( 1.3 ) is applied, which is formed so that on the cover ( 1 ) incident visible light is scattered, wherein at least one window area ( 1.1 . 1.2 ) of the cover ( 1 ) of the microstructure ( 1.3 ) is omitted. Abdeckscheibe (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Abdeckscheibe (1) im Wesentlichen aus Polymethylmetaacrylat besteht. Cover plate ( 1 ) according to claim 1, characterized in that the cover ( 1 ) consists essentially of polymethyl methacrylate. Abdeckscheibe (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der mindestens eine Fensterbereich (1.1, 1.2) so geformt und angeordnet ist, dass mindestens ein in Sichtrichtung hinter der Abdeckscheibe (1) angeordnetes Anzeigeinstrument (2.1 bis 2.8) durch diesen Fensterbereich (1.1, 1.2) ablesbar ist. Cover plate ( 1 ) according to one of the preceding claims, characterized in that the at least one window area ( 1.1 . 1.2 ) is shaped and arranged so that at least one in the viewing direction behind the cover ( 1 ) arranged display instrument ( 2.1 to 2.8 ) through this window area ( 1.1 . 1.2 ) is readable. Abdeckscheibe (1) nach Anspruch 3, dadurch gekennzeichnet, dass mindestens ein Fensterbereich (1.1, 1.2) im Wesentlichen passgenau zu einem durch diesen Fensterbereich (1.1, 1.2) ablesbaren Anzeigeinstrument (2.1 bis 2.8) geformt und angeordnet ist. Cover plate ( 1 ) according to claim 3, characterized in that at least one window area ( 1.1 . 1.2 ) substantially exactly to one through this window area ( 1.1 . 1.2 ) readable display instrument ( 2.1 to 2.8 ) is shaped and arranged. Verfahren zur Herstellung einer Abdeckscheibe (1) nach einem der vorangehenden Ansprüche, umfassend die folgenden Schritte: – Herstellung oder Anpassung mindestens eines Urformwerkzeugs (3) zur Urformung einer Abdeckscheibe (1), wobei eine Mikrostrukturmatrix (3.4) zur Abformung einer Mikrostruktur (1.3) auf einem einer Oberfläche einer urgeformten Abdeckscheibe (1) zugeordneten Teil des Urformwerkzeugs (3) aufgebracht wird, wobei Fensterbereichen (1.1, 1.2) zugeordnete Teile des Urformwerkzeugs (3) von der Mikrostrukturmatrix (3.4) ausgespart werden und – Urformung von mindestens einer Abdeckscheibe (1) mittels des Urformwerkzeugs (3) mit aufgebrachter Mikrostrukturmatrix (3.4). Method for producing a cover plate ( 1 ) according to one of the preceding claims, comprising the following steps: - manufacture or adaptation of at least one master mold ( 3 ) for forming a cover plate ( 1 ), wherein a microstructure matrix ( 3.4 ) to Impression of a microstructure ( 1.3 ) on one of a surface of a molded cover ( 1 ) associated part of the master mold ( 3 ) is applied, wherein window areas ( 1.1 . 1.2 ) associated parts of the master mold ( 3 ) of the microstructure matrix ( 3.4 ) and - Urformung of at least one cover ( 1 ) by means of the original mold ( 3 ) with applied microstructure matrix ( 3.4 ). Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die Urformung einer Abdeckscheibe (1) mittels Spritzgießen erfolgt. A method according to claim 5, characterized in that the original formation of a cover ( 1 ) is carried out by injection molding. Verfahren nach einem der Ansprüche 5 bis 6, dadurch gekennzeichnet, dass das Urformwerkzeug (3) aus Stahl gefertigt wird und die Mikrostrukturmatrix (3.4) mittels Ätzen aufgebracht wird. Method according to one of claims 5 to 6, characterized in that the original mold ( 3 ) is made of steel and the microstructure matrix ( 3.4 ) is applied by etching. Verfahren nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass ein die Mikrostrukturmatrix (3.4) mindestens teilweise tragender Mikrostrukturträger (3.3) im Urformwerkzeug (3) austauschbar angeordnet ist, wobei durch Austausch des Mikrostrukturträgers (3.3) Abdeckscheiben (1) mit unterschiedlicher Anordnung von Fensterbereichen (1.1, 1.2) bei gleicher geometrischer Grundform herstellbar sind. Method according to one of claims 5 to 7, characterized in that a microstructure matrix ( 3.4 ) at least partially supporting microstructure support ( 3.3 ) in the original mold ( 3 ) is arranged interchangeably, wherein by replacing the microstructure carrier ( 3.3 ) Cover discs ( 1 ) with different arrangement of window areas ( 1.1 . 1.2 ) can be produced with the same geometric basic shape.
DE102014201885.4A 2014-02-03 2014-02-03 Cover for at least one display instrument in a vehicle Withdrawn DE102014201885A1 (en)

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US14/611,881 US9827736B2 (en) 2014-02-03 2015-02-02 Cover panel for at least one display instrument in a vehicle
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